18752830993 has 6 divisors (see below), whose sum is σ = 20306320134. Its totient is φ = 17310305376.

The previous prime is 18752830969. The next prime is 18752831003. The reversal of 18752830993 is 39903825781.

It can be written as a sum of positive squares in 3 ways, for example, as 107474689 + 18645356304 = 10367^2 + 136548^2 .

It is a de Polignac number, because none of the positive numbers 2^k-18752830993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18752830963) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 55481580 + ... + 55481917.

It is an arithmetic number, because the mean of its divisors is an integer number (3384386689).

Almost surely, 2^18752830993 is an apocalyptic number.

18752830993 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

18752830993 is a deficient number, since it is larger than the sum of its proper divisors (1553489141).

18752830993 is a wasteful number, since it uses less digits than its factorization.

18752830993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110963523 (or 110963510 counting only the distinct ones).

The product of its (nonzero) digits is 3265920, while the sum is 55.

The spelling of 18752830993 in words is "eighteen billion, seven hundred fifty-two million, eight hundred thirty thousand, nine hundred ninety-three".